Screen-printing apparatus

Abstract

A screen-printing apparatus with enhanced accuracy of positioning a mask to a material to be printed, in which a printing table is fixed, the mask is displaced in a right-left direction and a front-rear direction, and rotated in a horizontal plane in accordance with a position confirmation signal from a camera device and the mask, a mask support frame, a squeegee device are moved up and down together at a predetermined timing at every printing step.

What is claimed is:  
     
       1. A screen-printing apparatus comprising a mask and a mask support frame, a squeegee device, a printing table for supporting a material to be printed, and a camera device for imaging a position confirmation mark of the material to be printed by means of a camera to confirm a position of the material to be printed, the printing table being fixed at a given position, the mask being displaced in a right-left direction and a front-rear direction, and being rotated in a horizontal plane in accordance with a position confirmation signal from the camera device so as to accord the positions of the mask and the material to be printed, the mask and mask support frame and the squeegee device being moved up and down together at a predetermined timing at every printing step, said camera device being disposed between said mask and said printing table so that said camera device can move in the right and left direction and the up and down direction with respect to said material to be printed independently of said mask and said printing table. 
     
     
       2. A screen-printing apparatus according to  claim 1 , wherein the material to be printed is made of an elongate film, rolled in a bobbin, drawn out and printed on the printing table in order. 
     
     
       3. A screen-printing apparatus comprising: 
       a mask;  
       a mask support frame carrying said mask;  
       a squeegee device disposed above said mask;  
       a printing table fixed at a predetermined position for supporting a material or substrate for receiving printed matter; and  
       a camera device disposed between said mask and said printing table, said camera device being mounted for reciprocation in a vertical direction and a horizontal direction for imaging a position confirmation mark on said material or substrate to confirm a position of said material or substrate on said printing table,  
       said mask being displaceable in a pair of mutually orthogonal horizontal directions and being rotatable in a horizontal plane in accordance with a position confirmation signal from said camera device so as to coordinate the positions of said mask and said material or substrate,  
       said mask, said mask support frame, and said squeegee device being movable together in said vertical direction at a predetermined timing at every printing step,  
       said camera device being movable independently of said mask and said printing table.  
     
     
       4. A screen-printing apparatus according to  claim 3 , wherein said material or substrate is an elongate film rolled in a bobbin and drawn out for printing on said printing table.